Home / 20,751.36-28,640.16-12,372.72

Finding the Fourth Proportional to 20,751.36, 28,640.16 and 12,372.72

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Solution

The fourth proportional to 20,751.36, 28,640.16 and 12,372.72 is: 17,076.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.36 : 28,640.16 = 12,372.72 : x
  2. Step 2: Convert to fraction form
    20,751.36/28,640.16 = 12,372.72/x
  3. Step 3: Cross multiply
    20,751.36x = 28,640.16 × 12,372.72
  4. Step 4: Simplify right side
    20,751.36x = 354,356,680.44
  5. Step 5: Solve for x
    x = 354,356,680.44/20,751.36
  6. Step 6: Final answer
    x = 17,076.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.